/*[me]*/
select ${  fields  }, '${fields}', '${  db}'
from ${db}.pg_aggregate
where
    -- #choose
    -- #when :num <> blank
    id = :num
    -- #break

    -- #when :id = blank
    id = 14
      -- #break

      -- #default
        id = 10
-- #break
-- #end
;